问题 单项选择题

()标准中定义了MP3音乐标准。

A.JPEG

B.MPEG-1

C.MPEG-2

D.MPEG-3

答案

参考答案:D

解析:

[分析] JPEG是静止图像压缩和解压缩算法的标准。JPEG成为了ISO的国际标准。

MPEG-3压缩较大,是一种有损压缩,其实际音质并不完美。在网络、可视电话等通信方面,MP3大有用武之地。

MPEG-X版本是指一组ITU和ISO制定发布的视频、音频和数据的压缩标准。现在有3个版本的MPEG,即MPEG-1,MPEG-2和MPEG-4。MPEG在提供高压缩比的同时,数据压缩的损失很小。MPEG是动态图像压缩编码标准。MPEG标准分MPEG视频、MPEG音频和视频音频同步3部分。

MPEG-1:数字电视标准。

MPEG-2:数字电视标准。

MPEG-4:多媒体应用标准。

阅读理解

My life as a ‘runner’ began by running in a playground near my home in order to lose weight about 2 years ago. As time went by, I found myself so good at running that sometimes, I even forgot how many rounds I ran around the playground.

Thanks to all this practice, I was able to win the 5th place in short course marathon game at ‘BASF Yeosu Site Athletic Competition’ held in October 2002. This event inspired(鼓舞)me to take part in public short-course marathon games such as 10km, 20km and half-course competitions. Finally, in May 2003, I was able to complete a full course (路线) marathon for the first time of my life. My next challenge was the Boston Marathon race, which is the world's oldest and most famous marathon races. To qualify for the Boston Marathon, one should meet the designated time standard of their age group at a certified marathon. So I took part in ChunCheon Marathon in Korea. I had to finish the full coursewithin 3 hours and 30 minutes to meet the time standard for my age group (45 to 49 years old). But to my pleasant surprise, I recorded 3 hours 22 minutes, which is 25 minute faster than my previous best record!

In April 2004, I was finally able to go to Boston. I was very pleased and proud because I could play a role to promote BASF all across the world through this sport. And it really happened! When I ran in the Boston Marathon wearing BASF logo(标记), people along the streets rooted for me shouting ‘BASF! BASF!’. I was very touched and so proud of my company. Of course I completed the full course successfully. After the game, I was interviewed by Korean local newspapers and had an opportunity to appear on several TV shows, which helped me to promote BASF in the community.

小题1:The author first began running in order to ______.

A.build up his strength

B.prepare for a marathon race

C.lose weight

D.train for a sport meet小题2: From the passage we can learn that BASF is ______.

A.a company

B.a book

C.a piece of sports equipment

D.a city小题3:We learn from the passage that the author is NOW______.

A.in his thirties

B.in his late forties

C.in his twenties

D.in his fifties小题4:According to the passage, the author first took part in a full course marathon in ______.

A.2002

B.2003

C.2004

D.2005

多项选择题